Window-lock.



T. A. MONSEES.

WINDOW L APPucATmN FILED MA 191s.

1,1,705, Patented Aug. 3, 1915.

"is PATENT @FFICE.

THOMAS A. MONSEES, OF NEW YORK, N. Y., ASSIGNQR 0F ONE-HALF TO WILLIAMSTEMPEL, 0F BROOKLYN, NEW'YORK.

WINDOW-LOCK.

Specification of Letters Patent.

Patented Aug. 3, 1915.

Application filed March 6, 1915. Serial No. 12,493. I

To all whom it may concern:

Be it known that I, THOMAS A. MONSEES, a citizen of the United States,and a resident of the borough of Queens, in the city and State of New-York,'have invented certain new and useful Improvements in Window-Locks, of which the following is a specification.

My invention relates to window locks adapted to be used for lockingsliding windows to prevent them from being moved up or down except fromthe inside of the buildmg.

An object of the invention is to provide a lock of this character whichwill lock the window sash or sashes in closed or partially openedposition, so that'the sash will be securely locked when entirely closedor when partially opened for ventilation.

Another object of my invention is to provide a lock of this characterwhich will be very inexpensive, light and compact, but which willnevertheless be strong enough to defeat any attempt to open a windowfrom the outside, even to the extent of withstanding the. action of ajimmy applied to the sash.

The present invention is such that the lock cannot be released byslipping a knife or flat instrument between the engaging member and thesash.

In the drawings forming part of this application, Figure 1 is a frontelevation of the upper and lower sashes and part of the easement of anordinary window, showing my improved lock attached, Fig. 2 is asectional View thereof, taken on the line 2-2 of Fig. 1, Fig. 3 is asectional view, taken on the line 33 of Fig. 2, and Fig. 4: is asectional view, taken on the line 4l4 of Fig. 3.

The look, as herein shown, consists of but three separate parts whichmay be stamped from sheet metal, and for this reason the device is veryinexpensive. As shown in the drawing, the stationary part consists of abase 1, which is attached, as by the screws 2, to any suitable portionof the sash, preferably to the upper surface of the top rail 3, of thelower sash, and near one side of the latter, so that the lock may engagethe side rail 4 of the upper sash. There are preferably providedintegral, depending plates 6, 7, at opposite ends of the base, which lieagainst the outer and inner faces of the rail 3, to which they aresecured by screws 8, 9,

to more firmly hold the base in place to withstand lateral stresses.

lhere are upstanding side plates 10, preferably integral with the base,whichsupport a pin 11, extending through apertures in the plates andheld therein in any desired manner, as by upsetting the ends. There isan eccentric and resilient wedging member mounted upon the pin 11 andmoving between the plates 10. This consists of a resillen-t strap springhaving one end 13, wound around the pin 11 to secure the spring in placeand to permit it to swing around the pin as its axis. This spring memberis'curved at 12 to form a looped or oval portion and from there itpasses under the pin 11 and extends upwardly at 13 if the device is inlocked position, or outwardly if in unlocked position. There is a bracearm 14 which is hinged at 15 to the extended arm '13, and it is free toswing from this hinge. The upper surface .of the base 1 is provided withteeth or notches 16 with which the free end of the brace 14 isadapted'to engage.

When the device is attached to a window, as shown in the drawing, thebrace 14 is tripped in the manner shown in Fig. 4 whenever it is desiredto move the sash. When, however, the sashes are to be locked the arm 13is swung up to the position shown in Figs. 1, 2 and 3, and the lower endof the brace 14 is engaged with the notched portion of the base. Inswinging the arm 13 upwardly the curved portion of the spring, which iseccentric to its pivot pin 11,

sion and the parts hold tightly in place. If

any attempt is made to force a knife or other flat object between thesash rails and between the spring loop 12 and the sash bar 4, nothingwill be gained even if the knife is forced under the spring, becausethespring will not be moved from clamped position and its pressure will notbe released from the upper sash. The inserted knife will not assist themovement of the sashes but it will simply be tightly pressed between theparts. No action, on the spring loop will release the grip. Tamperingwiththe the loop will, if anything, tighten its grip, because anycompression of the loop will tend to advance the brace to a notch of thebase which will cause the loop to be held more tightly compressed.

To lock the sashes in partly opened position the lock is first releasedand then either or both sashes are moved to the de sired position. Thelock is then set in the manner previously described, and it will lockthe sashes in their new positions, in the same manner as when bothsashes are closed.

Having described my invention, what I claim is:

.1. A 'device for locking a window sash, comprising a base and aresilient member formed in a loop and mounted to turn eccentrically on apivot and arranged to engage a surface adjacent the window sash to whichthe base is secured.

2. A device for looking a window sash, comprising a base and a resilientmember formed in a loop and mounted to turn eccentrically on a pivot andarranged to engage a surface adjacent the window sash to whichthe baseis secured, and means for holding said loop in engagement with saidsurface.

3. A device for looking a window sash, comprising a base, a resilientmember formed in a loop and mounted to turn ec Copies of this patent maybe obtained for five cents each, by addressing the centrically on apivot and arranged to engage a surface adjacent the sash to which thebase is secured, and a brace fulcrumed to said resilient '-member andadapted to hold said loop engaged with said surface.

4. A device for locking a window sash, comprising a base,aresilientmember formed in a loop and mounted to turn eccentrically on apivot and arranged to engage a surface adjacent the sash to which thebase is secured, and a brace fulcrumed to said resilient member, saidbase having-notches for holding the free end of the brace, whereby theresilient member may be held in engagement with said surface.

5. .A device for looking a window sash, comprising a base, upwardlyextending platesand a pin supported in said plates, a spring rocking onsaid pin and moving between said plates, said spring comprising a looparranged eccentrically relative to the pin, said spring extending under,and beyond the pin to form an arm and a brace fulcrumed to said arm,said base having notches withwhich the free end of the brace may engage,whereby the eccentric loop may be held against a surface adjacent thesash to which the device is attached.

Signed at the'city, county and State of New York, this 3rd day of March,1915.

THOMAS A. MONSEES.

Commissioner of Patents,

Washington, D. 0.

